The FN Five-seveN is a single-action semi-automatic pistol chambered in 5.7x28mm. The caliber was developed by FN alongside the P90 PDW for NATO evaluation, and the Five-seveN is the pistol counterpart using the same ammunition. The polymer frame and steel slide keep the loaded weight low, and the 20-round magazine capacity is notably higher than most comparable full-size pistols. 
 

Key Specifications 

• Manufacturer: FN America 
• Model: Five-seveN 
• Caliber: 5.7X28mm 
• Action: Single 
• Capacity: 20 rounds 
• Barrel Length: 4.8 inches 
• Weight: 1.31 lbs (21 oz) 
• Frame Material: Polymer 
• Slide Material: Steel 
• Total Length: 8.2 inches 
• Total Height: 5.7 inches 
   

Detailed Features 

At 21 oz, the Five-seveN is among the lightest pistols in the full-size category despite the all-steel slide. The 5.7x28mm cartridge produces significantly less felt recoil than 9mm out of a pistol-length barrel, which translates to faster split times for most shooters. Adjustable rear sights allow windage correction without tools. The manual safety is frame-mounted and straightforward to operate. The textured polymer grip handles well even without gloves.

The Five-seveN has a dedicated following, and most of the enthusiasm centers on two things: the low recoil of the 5.7x28mm round and the 20-round capacity. Experienced shooters report noticeably faster follow-up shots compared to 9mm, particularly for those with smaller hands who benefit from less muzzle rise.

The persistent criticism is ammunition cost and availability. 5.7x28mm runs significantly more per round than 9mm, which limits how much range time most owners put in. During shortage periods, it can be genuinely hard to find. Aftermarket options are thinner than what's available for the Glock or M&P ecosystem.

Some discussions touch on the niche nature of the caliber -- 5.7x28mm from a civilian pistol doesn't offer the armor-penetrating capability of the military loads, so the terminal ballistics debate comes up regularly. For shooters who train frequently and can absorb the ammunition cost, the handling characteristics are generally well-regarded. For casual range use, the economics are a harder sell.